9Ahn, I. S., Kim, J. H., Kim, S., Chung, J. W., Kim, H., Kang, H. S., & Kim, D. K. (2009). Impairment of instrumental activities of daily living in patients with mild cognitive impairment. Psychiatry Investigation, 6(3), 180-184.
10Akbaraly, T. N., Portet, F., Fustinoni, S., Dartigues, J. F., Artero, S., Rouaud, O Berr, C. (2009). Leisure activities and the risk of dementia in the elderly: Results from the Three-City Study. Neurology, 73(11), 854-861.